If you go over the controller's Voc input limit, it fries. No margin, no second chances.
You can do 24-24 with a PWM that is 12/24 but of course you cannot do 24-12 unless you have the buck converter MPPT.
I ran my 255w panel 37voc 24-24 with my Solar 30 PWM no problem. Don't know its Voc limit.
My MPPT Eco-Worthy 20 amper has only a 42Voc limit so can't run two 12s in series (newer ones of those have a 50Voc limit)
Not sure where a 32 cell panel stands in terms of meeting charging specs. Not as good as 36. I posted about my 60 cell on 24-24 stalling out at 30v, which was just ok to meet the 14.8 spec.
